2. Materials and methods
2.1. Ethics statement
The experiment was conducted following the guidelines of the
Animal Ethics Committee at Nanjing Agricultural University in
China. The slaughter and sampling procedures complied with the
“Guidelines on Ethical Treatment of Experimental Animals”(2006)
No. 398 set by the Ministry of Science and Technology of China
and“the Regulation Regarding the Management and Treatment of
Experimental Animals”(2008) No. 45 set by the Jiangsu Provincial
People's Government.